iPhone/android app and PHP knowledge needed (Luxembourg)

we are currently looking to get a couple of people together who know how to go about writing an iPhone/Android app - the same goes for someone knowing PHP - we have the source code - but would need to adjust to the actual market circumstances

it can either be one person or even more - that way we could form a small group to look into this application which is related to iPhone/androids and enhancing traffic (vehicle) security - so anyone knowing about car sensors (how the function) is invited to join our team